The company still believes in the technology. "Project Wing has the potential to remove a big chunk of the friction in how physical things are moved around in the world," the X group said in a statement. "What we're doing now is developing the next phase of our technology, and as always are thinking in a very broad way about all the potential use cases for delivery by unmanned aerial systems. While there's still a lot of work to be done, we believe that opening the skies to faster, more efficient transportation of goods is a moonshot worth pursuing."

E-commerce titan Amazon remains a vocal advocate of drones to deliver products. With faster delivery, e-commerce will expand from an occasional activity to a frequently used way to get whatever you need whenever you need it.